<!DOCTYPE html>
<html>
	<head>
		<style>
			/* 请在此处编写CSS样式 */
			*{
				font-family: Arial;
			}
			p{
				font-size: 16px;
				line-height: 1.5em;
				letter-spacing: 1px;
				color: #ff0000;
				background-color: lightgray;
			}
			h1{
				font-size: 28px;
				line-height: 1.2em;
				letter-spacing: 2px;
				color: blue;
				background-color: white;
			}
		</style>
	</head>
	<body>
		<h1>标题</h1>
		<p>这是一个段落。</p>
	</body>
</html>
